Pick of The Week
 
 

What Lies Beneath (November 8, 2002)

IMAGES

  • Higher resolution version (TIF,4.0M)

    MOVIES

  • MPEG format (963K)
  • Quicktime format: large (3.0M), small (943K)
  • A comparison of the Sun on 6 November 2002, in extreme ultraviolet light and as an image of its magnetic activity, is revealing. The ultraviolet image (left) of the inner corona --- the Sun's tenuous, outer atmosphere --- shows regions of intense magnetic activity as whiter areas. You can pick out at least eight of them. The magnetic image (right), which was taken almost simultaneously, shows the surface of the Sun and reveals these same clusters of activity, with the black and white areas indicating north and south magnetic polarity. In visible light these same areas would be seen as sunspots. These active regions are often the sources of solar storms. The comparison helps underscore the important role of magnetic energy in controlling the structure and activity of the Sun's outer atmosphere. This is best seen in the movies offered here.

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    SOHO began its Weekly Pick some time after sending a weekly image or video clip to the American Museum of Natural History (Rose Center) in New York City. There, the SOHO Weekly Pick is displayed with some annotations on a large plasma display.

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